Conveyer apparatus.



Patented Maf. 4,. |902. G. S. BAKER.

GONVEYER APPARATUS.

(Application-med Dec. 3, 1901.)`

5 Sheets-Sheet I-.

No. 694,5l9. Patented Mar. 4, |902.

G. s BAKl-m.

CDNVEYER APPARATUS.

(Application led Dec. 3, 1901.) (Nil Model.) 5 Sheets-Sheet 2.

www

No. 694,519. Patented Mar. 4, |902. G. S. BAKER.

CONVEYEH APPARATUS.

(Application filed Dec. B, 1901.; (un Model.) 5 'sheets-sheet s.

No. 694,519. Y f Patented' Mar. 4., |902.,

G. S. BAKER'.

CONVEYER APPARATUS.

' (Applicationmdnems.1901.;

5 Sheets-Sheet 4.

(No Model.)

Ptente'd Mar. 4,1902. G. S. BAKER. l CUNVEYEB APPARATUS. (Appuation inedDec. a, m01.;

(No Model.)

5 Sheets-Sheet 5.

| I I L l l l l I l I I l I A I I 4 l I nIO y UNITED STATES PATENTOFFICE.

GEORGE sAMUEL BAKER, on LojNDorL' ENGLAND.

i CONVEYER APPARATUS.

SPECIFItlltTIlQltTV forming part ofrlet'te'rs Patent No. 694,519,l datedMarch 4, 1902. Application iiled December 3, 1901. Serial No. 84,568.(No model.) i

To MZ whom it inap/:concern:

Be it known that I, GEORGE SAMUEL BA- KER, a subject ofr they King ofEngland, residing in London, England, have invented certain new anduseful Improvements in or Relating to Conveyer Apparatus, (tor which Ihave made application kfor Letters Patent in Great Britain under No.22,656, dated November 9, 1901,) of which the following is aspecification. f

This invention relates to conveyer apparatus adapted for use inacooling, drying, heating, or the like chamber, and has for its object toprovide means by which 'articles may be introduced into and withdrawn.from' the chamber without exposing the interior of thev is provided withtwo mouths, one of whichl serves as a charging-mouth andthe other adischarging-mouth. The articles to be treated within the chamberare madeto enter by the charging-mouth and after having been exposed to acooling or other agent within the chamber are withdrawn by thedischargingmouth. A series of receptacles are provided to receive thearticles to be treated, and each receptacle is so shaped that it formswith the mouth through which it is passing a valve, so that each mouthis closed in turn by the same receptacle. The mouths of the chamber areconveniently placed one above the other, and an elevator is arranged atthe rear end within the chamber to receive the receptacles from thelevel at which they enter the chamber and lower them to the level ofthedischarging-mouth if the latter is placed at the bottom. A similarelevator is provided outside the mouths and cooperates with the elevatorwithin the chamber. vator receives the receptacles as they aredischarged from the chamber and raises them to the level of thecharging-mouth, by which they reenter the chamber. Each of thereceptacles is provided with coupling-tongues at each end, so that aseach receptacle is raised or lowered from one level to the other it isautomatically disconnected from its adjacent receptacle and connectedtothe end receptacle lon the other level. The recept-acles by means ofthis system of coupling are This second ele-l made to form their ownchain, so that a separate conveyer-band or traveling chain is dispensedwith.

.Mechanism is provided for operating the elevators at the proper momentand also for advancing and withdrawing the receptacles intheir properorder.

In the accompanying drawings, Figure 1 is a longitudinal verticalsection of a chamber provided with conveying apparatus constructedaccording to this invention.. Fig. 2

is a plan Vof the same. Fig. 3 is a side elevav tion, on an enlargedscale, ofthe front elevator with its operating mechanism. Fig. 4 is anend elevation of the frjont elevator, in part section, on line 4 4 ofFig; 3. Fig. 5 is a perspectiveview of a detail of the conveyingapparatus, and Fig. 6 is a longitudinal vertical section of a chamber,provided with a modilied construction of conveying apparatus.

Like letters indicate like parts throughout the drawings.

The chamber A, Figs. 1 and 2, may be of any convenient construction andis provided with a charging-mouth A and a dischargingmonth A2, situatedvertically one above the other. The receptacles B are each made toexactly fill and completely close the mouths yof the chamber. as theypass through them and arerpreferably constructed in the form votoblongframes, open at the top and bottom,

adapted to receive trays to support the articles to be treated in thechamber.

` Within the chamber A is a platform B, which supports the receptaclesas they enter by the charging-mo nth, and below this is a secondplatform or the door of the chamber B2, upon which the receptaclestravel as they `return to the discharging-mouth. The plat- `forms B B2in the case illustrated comprise IOO At the end of the platform B is anelevator C, adapted to rise and fall in guides C', formed in a frameC2.The elevator C is conveniently made in the form of a rail-section, sothat its rails register with the rails B' when in the raised positionand with the rails B2 when in the lowered position. Lugs C3 are providedon either side of the elevator, engaging the guides C', and to theselugs are pivoted links D, the free ends of which are in turn ypivoted toarms D', secured to rockshafts D2, mounted in the frame C2. To each ofthe rock-shafts D2 and preferably midway of the length of each shaft issecured an arm D2, each of which is connected to a rod D4, which extendsthrough the whole length of the chamberl to mechanism without the saineby which the elevator is operated. Ther receptacles B are received onthe rails B2 from the elevator C and discharged from thedischarging-mouth A2 of the chamber. onto a stationary platform E. Thisstationary platform or rail-section is supported by or made integralwith a frame E', which also carries the mechanism for operating theelevator C. This mechanism comprises a drivinggshaft F, Figs. 3 and 4,which carries a double-toothed quadrant F'. Pivoted at F2 to the frameand adapted to gear with the toothed quadrant F' is a wheel F3, carryinga crank-pin F4. Mounted transversely in the frame E is a rock-shaft G,operatively connected by means of an arm G' and a link G2 to thecrank-pin F4 of the toothed wheel F2. A second arm G3 is secured to therock-shaft G and its free end pivoted to the longitudinal rod D4,operatively connected with the elevator C, as described. The wheel F3 isprovided at opposite sides with locking portions F5, which projectbeyond the teethof the wheel and are adapt-ed to engage correspondinglocking portions F6 on the toothed quadrant F'.

To raise the receptacle from the stationary platform E, spring-pawls Hare provided, two on either side of the platform. The pawls H areprovided with sliding blocks H', operating in grooves or slots H2 in thesides of the frame E'. Pivoted to each of the blocks H' is a link G4,the free end of which is pivoted to an arm G5. The arms G5 of the blocksH' of one pair of pawls are secured to the rockshaft G, and the arms ofthe other pair of spring-pawls are secured to a second rockshaft G,mounted parallel to the rock-shaft G. Secured to the rock-shaft G6 is anarm G7, corresponding to the arm G3 of the rock-shaft G, and these twoarms are connected together by the rod D4.

Above the stationary platform E and level with the rails B' of thecharging-mouth is a spring-controlled rail-section J. The rail-sectionis made in two independent parts, each carried by a pair of spring-armsJ. The spring-arms are secured to the frame E' and allow the two partsof the rail-section to be forced away from each other as a receptacle israised between them by the pawls H. Each part J is provided with aninclined portion J2, against which the receptacle strikes as it rises,

and each part is out away at J2 to allow the mounted in slots or guidesK2 in the rails B'.

The spring-arms which carry the pawls are of such length that thedistance between the two opposed pawl-faces of each double pawl is fequal to the length of each receptacle. The two pawl ends nearest themouths ofthe chamber are upwardly turned and engage the rear lower endsof the receptacles on the rails B', while the two pawl ends farthestfrom the mouths of the chamber are downwardly directed, so that theyengage the upper portions ofthe rear ends of the receptacles on therails B2. By this arrangement the pawl ends nearest the mouths of thechamber advance the upper line of receptacles when the cross-head isadvanced into the chamber, while the pawl ends farthest from the mouthsof the chamber withdraw the receptacles on the rails B2 when themovement of the crosshead is reversed.

To operate the cross-head, connecting-rods K3, Fig. 2, are provided, oneat each end of the cross head. The rods K3 are carried through the endof the chamber, one on each side of the mouths of the chamber, so thatthey project above the frame E' on either side of the receptacles B.Mounted in suitable bearings in the frame E' is a third rock-shaft L.Secured at each end of this rock-shaft is an arm L', operativelyconnected by a link L2 to one of the connecting-rods K5. An arm Lf4 isalso secured to the rock-shaft L and connected by a link L4 to thecrank-pin L5 of a toothed wheel L6, similarly constructed to the toothedwheel F2. The gea r-wheel L6 is provided with locking-pieces L7,corresponding to the locking-pieces F5 of the wheel F2 and Aalsocopcrates with the double quadrantF' in the same manner as that wheel.

As the receptacles are advanced and withdrawn by the pawls K operatingconveniently upon the third or fourth receptacle within the chamber ot'the upper and lower tiers, it is necessary in order that all thereceptacles may be operated that they should be connected together bysome coupling device. The form of coupling preferred is illustrated indetail in Fig. 5 and comprises a pair of hooked tongues B7 B8 on theends of each receptacle. The tongues BS are bell-mouthed or providedwith a wider end space at their upper ends than at their lower ends, sothat they will not fail to engage the opposed pair of couplingtongues(during the operation IOO IOS

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by rotating this wheel depresses the arm L3v on the rock-shaft-L, sothat the arms L', connected to the spring-pawls K,are drawn back,

moving the pawls toward the mouths of the chamber.l This movement of thepawls causes the pawl endsnearest the mouth of the chamber to springback and pass along vbeneath one of thereceptacles of theupper-tier,while the pawl ends remote from the' mouth of the chamber engage thereceptacle immediately below them, thus causing 4the receptacles' of thelower tier to be moved the length of one recept-acle in the direction ofthe discharging mouth.` By this movement the receptacle shown in thedrawings in the dischargingmouth of the chamber is forced out'upon thestationary platform or rails E and another receptacle placed. in thedischarging-mouth. The-teeth of the quadrant F are now disengaged fromthe wheel L6, and'one of the locking portions L7 coming against one ofthe locking portions FG of the quadrant causes the Wheel L6 to be heldstationary, so' that the arms L and their connected pawls K remain inthe withdrawn position. The double quadrant F continuing to rotate nowengages byV means of its second set of teeth the wheel F3. Therotation'of this wheel causes the arm G onl the rock-shaft G to bedepressed by means of its link G2 and the crank-'pin F4 on the wheel,and the movement thus imparted to the rockshaft operates the arm G3,connected to the rod D4, so that the'rod is moved in the directionindicated by the arrow. Pivoted to the rod D4 is the arm G7 on`- therock-shaft G6', as described above, so that the movement of this rodwill cause the rock-shaft GG to move' with 'the rock-shaft G in thedirection indicated by the arrows. This movement of the rock-shaftscauses the arms G5 to be depressed, so that rails E. The movement of therod D4 in ad-A dition to effecting the operation of theroclshaft GGoperates the elevator C within the' chamber. The arms D3 of therock-shafts D2 are pivoted to the rod D4, as described above, so that asthis rod is moved in the direction indicated by the-arrow the arms D onthe rock-shafts D2 are raised, carrying withl them the platform C. YThequadrant F nowleaves its lengagement; with the wheel F3, so that one ofthe locking parts F5 comes into operation with one vof the locking partsF of the quadrant, and the Wheel LG is again, operated. This secondhalflrevolution of the wheel LG brings the pawls K back into theiroriginal position, so that the pawl ends Vremote from lthe mouths'of thechamber will now slide over the receptacle beneath them, while the pawlends nearest the mouth of the chamber engage the receptacle immediatelyabove them and advance the upper tier of receptacles the length of onereceptacle. This movement places the end receptacle of the upper tierupon the elevator C and draws the re ceptacle shown in the drawings uponthe spring-,controlled rail-section J into the charging-mou th ofthechamber. The double quadrant F'fnow again leaves the wheel L(3 andoperates the wheel F?, so that this wheel receivesfa secondhalf-revolution and replaces the various parts connected with it in theposition shown in the drawings. `As by this meansv the pawls H arereturned to their raised position,'they carry with them thereceptaclewhich formerly rested upon the rails E, and asthe latter rises'it comes into contact with theinclined portions/J2 of the railsectionsJ, so that the parts J are forced back against the action of thespringarms`J"a'nd allow the passage of the receptacle. As soon as thereceptacle is raised free of the springcontrolled railsection J the tworail portions spring inbeneath the receptacle and serve to support it'asit is drawn into the chamber. In'raising the receptacle from the `railsE to the railsJthe coupling-tongues*Bsiare made to slide vertically outof theirkv engagement with the tongues B7 of theadjacent receptacle andengage tongues B7 of the receptacle in the charging-mouth. Simultaneouswith the' upward movement of the pawls H the elevator C is lowered bythe reverse movement of the rod D4, sothat the receptacle resting uponitis brought into alinement with the discharging-month of the chamber,being disconnected IOO of operations, which'may be continuouslyrepeated.

It will be observed that the automatic connecting anddisconnecting'ofthe receptacles by means of the coupling-tongues B7 B8enables an elevator band or chainto be dis,-V

pensed with,the receptacles themselves forming the chain, sothat'eitherthe upper or the lower tier may be moved as one body.

Clutch mechanism of any convenient'con- .struction may be provided, sothat the quadrant F may be prevented from rotating whenever desired,this being especially useful where two or more cooling-chambers may bearranged side by sideand Yprovided with apparatus of `the kind describedoperated by a compound mechanism.

In Fig. 6 a modified construction of apparatus is illustrated, in whichthe spring-pawls H and spring-controlled rail-section .I are dispensedwith. In place of the spring-pawls l-I a platform or rail-section M isprovided similar to the platform C in the interior of the chamber, andthe links G4, formerly connected to the sliding blocks H of thespring-pawls H, are connected to lugs D' on the sides of the platform,sliding in slots or guides M2 in the frame E'. It will be noted alsothat the position of the levers D D3 of the elevator Gis reversed, sothat the elevator is now raised by moving the rod D4 to the rightinstead of by a movement to the left, as before. This constructionallows both elevators to rise and fall simultaneously. The operation ofthis apparatus is as follows: Presuming both elevators to be raised, asshown in the figure, and a receptacle resting upon the elevator outsidethe chamber,the double-toothed quadrant F' .first engages the wheel LG,so that the spring-pawls K are advanced into the chamber, carrying withthem the upper tier of receptacles. This places a receptacle upon theelevator C and that upon the elevator M is drawn into the charging-mouthof the chamber. The quadrant F' now frees the wheel L and engages thewheel F3, so that the elevator M is lowered, and with it the elevator Cwithin the chamber. The elevator M thus comes into position to receive areceptacle from the discharging-mouth, and the elevator C moves the endreceptacle of the upper tier from alinement with the charging-mouth andconnects it to the lower tier in alinem ent with the discharging-mouth.The continued movement of the double quadrant F now frees the wheel FSand again operates the wheel L, so that the pawls K are moved toward themouths of the chamber, carrying with them the lower tier of receptaclesand discharging the receptacle shown in the dischargingmouth onto theelevator M. The quadrant F now frees the wheel L6 and engages the nwheel F3, so that both elevators M and C are again raised and the partsrestored to the rst position, as shown in the drawings.

It is found convenient to make the walls of the mouths of the chamberextend the full length of each receptacle, and for this purposeinwardlydirected extensions -A3 are formed on the end wall of thechamber, thus constituting a conduit which the receptacles fit.Obviously these extensions may be dispensed with by making the wall thethickness required, and this thickness may be reduced by shorteningthereceptacles.

The cooling apparatus employed maybe of any convenient construction,that shown in the drawings comprising a pipe N, arranged above thereceptacles for circulating the cooling agent. Vertically beneath thepipe is disposed a tray or gutter N, depressed at one end from thehorizontal line, so that moisture condensing upon the pipe N may dripinto the gutter and iiow to the lower end, where it is carried off byawaste-pi pe N2, communicating with a gutter N3 in the floor of thechamber. The gutter N3 is conveniently used for the reception of theconnecting-rod D". Communicating with the gutter is a trapped pipe N",of known construction, by which the liquid as it collects may be carriedoff from the chamber. In addition to the circulatingpipes N or in placeof these brine-tanks may be used, if desired.

Obviously mechanisms other than that described may be used to operatethe receptacles whether required to operate as described with referenceto Figs. l to 4 or Fig. 6, any mechanism being suitable for this purposewhich will give the required order of rotation to the receptacles.

IVhat I claim as my invention, and desire,

to secure by Letters Patent, is-

l. In conveying apparatus for a cooling or other chamber the combinationof a chamber, a charging-mouth to the chamber, a discharging-month tothe chamber, a series of receptacles adapted to pass through thecharging and discharging mouths, means whereby each receptacle formswith the mouth through which it is passingavalve so that each mouth inturn is closed by the same receptacle, means for advancing thereceptacles into the chamber through the charging-mouth, means forsupporting the receptacles within the chamber and means for withdrawingthe receptacles from the chamber bythe discharging-mouth as set forth.

2. Ina conveying apparatus for a cooling or other chamber thecombination of achamber, a charging-mouth at oneend ofthe chamber, adischarging-mouth at the same end, a series of receptacles adapted topass through the charging and discharging mouths of the chamber, meanswhereby each receptacle forms with the mouth through which it is passinga valve so that each mouth in turn is closed by the same receptacle,means for advancing the receptacles into the chamber through thecharging-mouth, means for supporting the receptacles within the chamber,means for withdrawing the end receptacle within the chamber from itsalinement with the charging-mouth and placing it in alinement with thedischarging-mouth and means for withdrawing the receptacles frein thechamberby the dischargingmouth as set forth.

3. In a conveying apparatus for a cooling or other chamber thecombination of acharnber, a charging-mouth at one end of the chamber, adischarging-mouth at the same end, a

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series of receptacles adapted to pass through y the charging anddischarging mouths of the chamber, means whereby each receptacle formswith the mouth through which it is passing a valve so that each mouth inturn is closed by the same receptacle, means for advancing thereceptacles into the chamber through the charging-mouth, means for supporting the receptacles within the chamber, means for withdrawing theend receptacle within the chamber from its 'alinement with thecharging-mouth andY placing it in alinement with the discharging-mouth,means for withdrawing the receptacles from the chamber by thedischarging-mouth and means for placing thedischarged receptacles inposition to renter the charging-mouth as set forth.

4. In a conveying apparatus for a-cooling or other chamber thecombination of a chamber, a charging-mouth at one end of the chamber, adischarging-mouth at the same end, a series of receptacles adapted topass through the charging and discharging mouths of the chamber, meansVwhereby each receptacle forms with the mouth through which it ispassing a Valve so that each mouth in turn' is closed by the samereceptacle, means for advancing the receptacle lin to the chamberthrough the charging-mouth, means for supv porting the receptacleswithin the chamber,

means for interlocking the receptacles as they enter the chamber, meansfor withdrawing the end receptacle within the chamber from its alinementwith the charging-mouth and placing it in alinement with thedischargingmouth, means for'autoniatically disconnecting each receptaclewithin the chamber from for interlocking it with the outgoingreceptacles as it is moved into alinement with the discharging-mouth,and means for withdraw-A ing the receptacles from the chamber bythedischarging-mouth as set forth.

5. In a conveying'apparatus for a cooling or other chamber thecombination of a chamber, a charging-mouth at one end of the chamber, adischarging-mouth at the same end, va series of receptacles adapted topass through the charging and discharging mouths of the chamber; meanswhereby each receptacle forms with the mouth through which itis passinga valve so that each mouth in turn is closed by the same receptacle,`means for advancing the receptacles into the chamber through thecharging-mouth, means for supporting the receptacles within the chamber,means for withdrawing the uend receptacle within the chamber from itsalinement with the charging-mouth and placing it in alinementwith thedischarging-mouth, means for withdrawing the receptacles from thechamber by the dischargingmouth, means for placing the dischargedreceptacles in position to reenter the charging-mouth, means forinterlocking the receptacles as they are returned to the charging-mouthand means for disconnectng each receptacle within the' chamber from theincoming receptacles as it is moved out from alinement with thecharging-mouth and for interlocking it with the outgoing receptacles asit is moved into alinement with the discharging-mouth as set forth.-`

(5. In a conveying apparatus for a cooling or other chamber thecombination of a chamber, a charging-mouth at one end of the chamber, adischarging-mouth at the same end, a series of receptacles adapted topass through the charging and discharging mouths ofthe chamber, meanswhereby each receptacle forms with the mouth through which it is passinga valve so that each mouth in turn is closed by the same receptacle,automaticallyoperating coupling-tongues on the ends of each receptacle,means for advancing the receptac-les into the chamber through thecharging-mouth', means for supporting the receptacles wit-hin thechamber, means for withdrawing the end receptacle within the chamberfrom its alinement with the chargingmouth and placing it in alinementwith the discharging-mouth and means for withdrawing the'receptaclesfrom the chamber by the discharging-mouth as set forth.

'7. In a conveying apparatus for a cooling or other chamber thecombination of a chamber, acharging-mouth at one end of the chamber, adischarging-mouth at the same end, a series of receptacles adapted topass through the charging and discharging mouths of the chamber, meanswhereby each receptacle forms with the mouth through which it is passinga valve so thatl each mouth in turn is closed by the same receptacle,means for advancing the receptacles into `the chamber through thecharging-mouth, means for supporting the receptacles within the chamber,means for withdrawing the end receptacle within the chamber from itsalinement with the charging-mouth and placing it in alinement with thedischarging-mouth, means for withdrawing the receptacles from thechamber by the discharging-mouth, lneans for placing the dischargedreceptacles in position to renterthe charging-mouth andautomatically-operating coupling-tongues on the ends of each receptacleas set forth. S. In a conveying apparatus for a cooling or otherlchamber the combination of a chamber, a charging-mouth at one end ofthe chamber, adischarging-mouth at the same end, a series of receptaclesadapted to pass through the charging and discharging mouths of thechamber, means whereby cach receptacle forms with the .mouth throughwhich it is passing a Valve so that each mouth in turn is closed by thesame receptacle, automatically-operating bell-mouthed coupling-tongueson the ends of each receptacle, means foradvancing the receptacles intothe chamber through the charging-mouth, means for supporting thereceptacles withinthe chamber, means for withdrawing the end receptaclewithin the chamber from 4its alinement with the charging-mouth andplacing it in alinement with" the discharging-mouth and means for4withdrawing the receptacles from the chamber bythe discharging-mouth asset forth.

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9. In a conveying apparatus for a cooling 0r other chamber thecombination of a chamber, a charging-mouth at one end ofthe chamber, adischargingmouth at the same end, a series of receptacles adapted topass through the charging and discharging mouths of the chamber, meanswhereby each receptacle forms with the mouth through which it is passinga valve so that each mouth in turn is closed by the same receptacle,means for advancing the receptacles into the chamber through thecharging-mouth, means for supporting the receptacles within the chamber,means for withdrawing the end receptacle within the chamber from itsalinement with the charging-mouth and placing it in alinement with thedischarging-mouth, means for withdrawing the receptacles from thechamber by the discharging-mouth, means for placing the dischargedreceptacles in position to reenter the chargingmouth, andautomatically-operating bell-mouthed couplingtongues on the ends of eachreceptacle as set forth.

10. In conveying apparatus for a cooling or other chamber thecombination of a chamber, a charging-mouth at one end of the chamber, aplatform within the chamber level with the charging-mouth, adischarging-mouth at the same end as and below the chargingmouth, aseries of receptacles adapted to pass through the charging anddischarging mouths of the chamber, means whereby each receptacle formswith the mouth through which it is passing a valve so that each mouth inturn is closed by the same receptacle, means within the chamber forreceiving the receptacles at the end of the charging-mouth platform anddelivering them upon the floor of the chamber in alinement with thedischarging-mouth, guides within the chamber, a cross head mounted inthese guides between the advance and return tiers of receptacles, aforwardlyoperating pawl on the cross-head adapted to engage the uppertier of receptacles, a rearwardly-operating pawl secured to thecrosshead and adapted to engage the lower tier of 'receptacles and meansfor reciprocating the cross-head as set forth.

l1. In conveying apparatus for a cooling or other chamber thecombination of a chamber, a charging-mouth at one end of the chamber, aplatform withinthe chamber level with the charging-mouth, adischarging-mouth at the same end as and below the chargingmouth, aseries of receptacles adapted to pass through the charging anddischarging mouths of the chamber, means whereby each receptacle formswith the mouth through which it is passing a valve so that each mouth inturn is closed by the same receptacle, guides within the chamber for thereceptacles, means for advancing the receptacles through thecharging-mouth into the chamber, an elevator within the chamber at theend'of the charging-mouth platform, mechanism for alter-- nately raisingthe elevator to the platform within the chamber and lowering it to thefloor of the latter, a driving-shaft, a trame to carry thedriving-shaft, a toothed quadrant secured to the driving-shaft, atoothed wheel pivoted to the frame and adapted to be engaged by thequadrant, mechanism operatively connecting the toothed wheel with themechanism of the elevator, means for locking the toothed wheel when notengaged by the quadrant and means for withdrawing the receptacles fromthe discharging-mou th of the chamber as set forth.

12. In conveying apparatus for a cooling or other chamber thecombination of a chamber, a charging-mouth at one end of the chamber, aplatform within the chamber level with the chargingmouth, adischarging-mouth at the same end as and below the charging-mouth, aseries of receptacles adapted to pass through the charging anddischarging mouths of the chamber, means whereby each receptacle formswith the mouth through which itis passing a valve so that each mouth inturn is closed by the said receptacle, guides within the chamber for thereceptacles, means for advancing the receptacles through thecharging-mouth into the chamber, an elevator within the chamber at theend of the chargingmouth platform, mechanism for alternately raising theelevator to the platform within the chamber and lowering it to the Hoorof the latter, a driving-shaft a frame to carry the drivingshaft, atoothed quadrant secured to the driving-shaft, a toothed wheel pivotedto the frame and adapted to be engaged by the q uadrant, mechanismoperatively connecting the toothed wheel with the mechanism of theelevator, locking portions formed on-the toothed wheel at oppositepoints, a locking portion on the quadrant cooperating with those on thetoothed wheel, and means'for withdrawing 'the receptacles from thetdischarging-mouth of the chamber as set forth.

13. In conveying apparatus for a cooling or other chamber thecombination of a chamber, a charging-mouth at one end of the chamber, aplatform within the chamber level with the chargingmouth, a.discharging-mouth at the same end as and below the chargingmouth, aseries of receptacles adapted to pass th rough the charginganddischarging mouths of the chamber, means whereby each receptacleforms with the mouth through whichit is passing a valve so that eachmouth in turn'is closed by the same receptacle, vertically-operatingcoupling-tongues on the ends of each receptacle, guides within thechamber for the receptacles, other guides within the chamber, across-head mounted in these other guides, a forwardly-operatingspring-pawl secured to the cross-head and adapted to engage thereceptacles on the platform within the chamber, a connecting-rod securedat each end of the cross-head and extending through the front wall ofthe chamber on either side of the receptacles,a frame outside the mouthsof the chamber, a toothed-wheel pivoted to the frame, a crank-pin 011the wheel, mech- IOO IIO

anism operatively connecting the crank-pin with the connecting-rods ofthe Lcross-head for reciprocating the latter, a driving-shaft,

a toothed quadrant secured to the /driving.. shaft and adapted to engagethe teethof the wheel, means for automatically locking the wheel whennot engaged by the quadrant, an elevator within the chamber atthe end ofthe platform, mechanism for alternately raising a rear operatingspring-pawl secured to the cross-head of the forwardly-operating paWland adapted to engage the receptacles on the 'floor of the chamber asset forth.,

14. In conveying apparatus for a cooling or other chamber Vthecombination of a chamber,

a charging-mouth at one end of the chamber,

-a platform Within the chamber level with the charging-mouth, adischarging-mouth at the same end as and` below the charging-mouth, aseries of receptacles adapted to pass through the charging anddischarging mouths of the chamber, -means whereby each receptacleformswith the mouth throughwhich it is passing a valve so that each mouth inturn is closed by the same receptacle, verticallyoperatedcoupling-.tongues on the ends of each receptacle, guides within thechamber for the receptacles, other guides Withinthe chamber, across-head. mounted in theseother guides, a forwardly-operatingspring-pawl secured to the cross-head and adaptedto engagethereceptacles on the platform within the chamber, a connecting-rodsecured at each end to the cross-head and extending through thefront-wall of the chamberxon either side of the receptacles, a frameoutsidethe feeding end of the chamber, a toothed Wheel pivoted to theframe a crank-pin on the Wheel, mechanism operatively connecting. thiscrank-pin with the connecting-rods of the cross-head for reciprocatingthe latter, locking portions formed on the toothed .Wheel at oppositepoints, a driving-shaft, a toothed quadrant secured to theVdriving-shaftand adapted to engage the teeth of the Wheel, a locking portion onthequadrant cooperating With those on the toothed wheel, a second toothedWheel pivoted to the frame and adapted to coperate with the toothedquadranton the drivingshaft, an elevator `vithin the chamber at the endof the platform, mechanism for` alternately raising the elevator to theplatform Within the chamber andlowering it tothe floor of the latter, arod operatively connecting the mechanism of this elevator with thesecond toothedwheel onthe external frame and a rearwardly-operatingspring-pawl secured to the cross-head .of the forwardly-operating pawland adapted to engage thereceptaclcs on the oorof the chamber as setforth.

15. In conveying apparatus for a cooling-or other chamber thecombination of a chamber, a charging-mouth at one end of the chamber, aplatform in the chamberv level. with the charging-mouth, adischarging-mouth at the same end as and below the charging-mouth, aseries of receptacles adapted to pass through the charging anddischarging mouths of the chamber, means whereby each receptacle formswith the mouth through which it is.

passing a valve so that each mouth in turn is closed by the samereceptacle, verticallyoperating coupling-tongues on the ends of eachreceptacle, guides Within the chamber for the receptacles, other guideswithin the chamber, a cross-head mounted in these other. guides, aforwardly-operating spring-pawl secured-to the cross-head and adapted-toengagethe receptacles on the platform within the chamber, a frame, atoothed .Wheel pivoted to the frame, a crank-pin on the Wheel,

m echanism operatively con nectin g the crankpin With the cross-head forreciprocating the latter, a driving-shaft, a toothed quadrant secured tothe driving-shaft and adapted to engage the teeth of the wheel, Vmeansfor automatically locking the Wheel when not engaged by the quadrant, anelevator within the chamber at the end of the platform, mechanism foralternately raisin g'the elevator to the platform Within the chamber andlowering it to the floor of the latter, a second toothed Wheel pivotedto theframe and adapted yto coperate with the quadrant, an operating-rodconnecting the mechanism o'f this elevator with this toothed Wheel, anda rear operating spring-pawl secured tothe cross-head of theforwardly-operating pawl and adapted to engage the receptacles on thefloor of the chamber as set forth.

16. In conveying apparatus for a cooling orY IOO IIO

passing a valve so that each mouth in turn is closed by the samereceptacle vertically-operating coupling-tongues on theends of eachreceptacle, guides Within the chamber for the receptacles, other guidesWithin the chamber, a cross-head mounted in these other guides, aforwardly-operating spring-pawl secured to the cross-head and adapted.to engage the receptacles on the platform within the chamber, a frame, atoothed Wheelpivoted to the framea crank-,pin onthe Wheel, mechanismoperatively connecting the crank-pin with the cross-head/forreciprocating the latter, locking portions formed-on thetoothed Wheel atopposite points, a driving-shaft, a toothed quadrant. secured tothe'driving-shaftand adapted to engage Athe'teeth of the wheel, a

locking portion on the quadrant cooperating with those on the toothedwheel, a second toothed wheel pivoted to the frame and adapted tocooperate with the toothed quadrant on the driving-shaft, an elevatorwithin the chamber at the end of the platform, mechanism for alternatelyraisingthe elevator to the platform within the chamber and lowering itto the floor of the latter, a rod operatively connecting the mechanismoi' the elevator with the second toothed wheel on the frame and arearwardly-operating spring-pawl secured to the cross-head of theforwardly-operating pawl and adapted to engage the receptacles on thefloor of the chamber as set forth.

17. In conveying apparatus for a cooling or other-chamber thecombination of a chamber, a charging-mouth at one end of the chamber, aplatform within the chamber level with the charging-mouth, adischarging-.mouth at the same end as and below the charging-mouth, anelevatorontside the mouth of the chamber, a frame to support theelevator, a toothed wheel pivoted to the frame, a crank-pin on thewheel, mechanism operatively connecting the crank-pin and the elevatorfor raising and lowering the latter, a driving-shaft, a toothed quadrantsecured to the driving-shaft and adapted to engage the teeth of thewheel, means for automatically locking the wheel when not engaged by thequadrant, a series of receptacles adapted to pass through the chargingand discharging mouths ofthe chamber, means whereby eac-l1 receptacleforms with the mouth through which it is passinga valve so that eachmouth in turn is closed by the same receptacle, guides within thechamber for the receptacles, means for advancing the receptacles intothe chamber, an elevator within the chamber at the end of the platform,mechanism for alternately raising the elevator to the platform withinthe chamber and lowering it to the floor of the latter, an operating-rodconnecting the mechanism of this elevator with the mechanism of theoutside elevator and means for withdrawing the receptacles from thedischarging-mouth as set forth.

1S. In conveying apparatus for a cooling or other chamber thecombination of a chamber, a charging-mouth at one end of the chamber, apiatform within the chamberlevel with the charging-mouth, adischarging-mouth at the same end as and below the charging-mouth, anelevatoroutside the mouth of the chamber, a frame to support theelevator, a toothed wheel pivoted to the frame, a crank-pin on thewheel, mechanism operatively connecting the crank-pin and the elevatorfor raising and lowering the latter, a driving-shaft, a toothed quadrantsecured to the driving-shaft and adapted to engage the teeth ofv thewheel, means for locking the toothed wheel when not engaged by thequadrant, a series of receptacles adapted to pass through the chargingand discharging mouths of the chamber,

means whereby each receptacle forms with the mouth through which it ispassing a valve so that each mouth in turn is closed by the samereceptacle, vertically-operating coupling-tongues on the ends of eachreceptacle, guides within the chamber for the receptacles, other guideswithin the chamber, a vcrosshead mounted in these other guides, aforwardly-operating spring-pawl secured to the cross-head and adapted toengage the receptacles on the platform within the chamber, aconnecting-rod secured at each end of the cross-head and extendingthrough the front wall of the chamber on either side of the receptacles,a second toothed wheel pivoted to the frame of the elevator and adaptedto cooperate with the toothed quadrant on the driving-shaft, mechanismoperatively connecting this second toothed wheel with theconnecting-rods of the cross-head for reciprocating the latter, anelevator within the chamber at the end of the platform, mechanism foralternately raising the elevator to the platform within thev chamber andlowering it to the floor of the latter, an operating-rod connecting themechanism of this elevator with the mechanism of the outside elevatorand a rearwardly-operating spring-pawl secured to the cross-head of theforwardly-operating paw] and adapted to engage the receptacles on thefloor of the chamber as set forth.

19. In conveying apparatus fora cooling or other chamber the combinationof a chamber, a charging-mouth at one end of the chamber, a platformwithin the chamber level with the charging-mouth, a discharging-mouth atthe same end as and below the charging-mouth, an elevator outside themouth of the charnber, a frame to support the elevator, atoothed wheelpivoted to the frame, a crank-pin on the wheel, mechanism operativelyconnecting the crank-pin and the elevator for raising and lowering thelat-ter, locking portions formed on the toothed Wheel at oppositepoints, a. driving-shaft, a toothed quadrant secured to thedriving-shaft and adapted to engage the teeth of the wheel, a lockingportion on the quadrant cooperating with those on the toothed wheel, aseries of receptacles adapted to pass through the charging anddischarging mouths of the chamber, means whereby each receptacle formswith the mouth through which it is passing a valve so that each mouth inturn is closed by the same receptacle,vertically-operatingcoupling-tongues on theends of each receptacle,guides within the chamber for the receptacles, other guides within thechamber, a cross-head mounted in these other guides, aforwardly-operating springpawl secured to the cross-head and adapted toengage the receptacles on the platform within the chamber, aconnecting-rod secured at each end of the cross-head and extendingthrough the front wall of the chamber on either side of the receptacles,a second toothed wheel pivoted to the frame of the elevator and ICO IIO

adapted to coperate with the toothed quadl 'reciprocating the latter, anelevator Within the chamber at the end of the platform, mechanism foralternately raising the elevator to the platform within the chamber andlowering it to they floor of the latter, an operatingrod connecting themechanism of this elevator withthe mechanismof the outside elevator anda rearwardly-operating spring-pawl secured to the cross-head of theforwardly-operating pawl and adapted to engage thereceptacles on theiioor of the chamber as set` forth.

20. In conveying apparatus for a cooling or other chamber thecombination of achamber, a charging-mouth at one end of the chamber,- aplatform within the chamber flush with the oor of the charging-mouth, adischargingmouth at the same end and belowthe charging-mouth, anelevator outside the mouths of the chamber, a frame to support theelevator, vertical slot-s in the frame, a `lug on each side of theelevator engaging the slots in theframe, a shaft supported by the frameand mounted transversely tothe chamber, arms secured one at each end ofthe shaft, links connecting the free end of the arms to the lugs of theelevator, a third arm on the shaft, a toothed Wheel pivoted to theframe, a crank-pin on the wheel, a link connecting the crank-pin withthe third arm on the shaft, lockingportions formed on the toothed wheelat.' opposite points, a driving-shaft, a toothed quadrant secured to thedriving-shaft and adapted to engage'the teeth' of the Wheel, a locking'portion on the quadrant coperatingwith that on the toothed wheel, aseries ofl receptacles adapted to pass through the charging anddischarging mouths ofthe chamber, means whereby each receptaclefor'mswith the mouth through which-itv is passing'V a valve so Ythat eachmouth in turn is closed bythe same receptacle, vertically operatingcouplingtongues on the ends of each receptacle, guides within thechamber for the receptacles, other guides within the chamber, a crosshead mounted in these guides., a forwardly-operating spring-pawl securedto the cross-head and adapted to engage'the receptacles on the platformwithin the chamber, a connecting-rod secured at each end of thecross-head and extending through the front Wall of the chamber on eitherside of the receptacles, links on t'he'free ends of the 'rods outsidethe chamber, operating-arms pivoted to the links, a shaft mounted in theelevator-frame, means for connecting the voperating-arms to this shaft,athird arm secured to this shaft, a toothed wheelpivoted to the frame andadapted to coperate with the toothed quadrant on the driving-shaft, acrank-pin on this wheel, a link operatively connecting the crank-pinandl third arm on the shaft, locking portions on opposite sides of thewheel adapted to coperate with-the locking portion on the toothedquadrant, an elevator within the chamber at the end of thecharging-mouth platform, a frame for the elevator, vertical slots in theframe, a lug one on each 'side of the elevator engaging the slots, ashaft supported by the frame and mounted transversely tothe chamber,arms secured one at each end of the shaft, links connecting the free"ends of the arms to the lugs of the elevator, a third arm on 'theshaft, a rod operatively connecting this arm with the corresponding armof the other elevator and a rearwardly-operating pawl secured to thecross-head of the forwardly-operatin g pawl and adapted to engage thereceptacles on the oor ofthe chamber as set forth. f

In testimony whereof I have signed my name'to thisspeciication in thepresence of two subscribing witnesses.v

^ GEORGE SAMUEL BAKER. Witnesses:

G. F. WARREN, T. J. OsMA'N.

